A model for the spread and control of citrus tristeza virus disease

Citrus Tristeza Virus (CTV) causes a most destructive citrus disease in many parts of the world. The strategy for controlling the disease in Israel is based on the eradication of virus-infected trees, detected by an immunological method. A model for the spread and control of CTV is described. The disease spread depends on an infection rate parameter and on a detection coefficient. Both parameters vary with time. Simulation of the model under different conditions assists us to make decisions regarding the control of CTV disease.     

Working with legal pluralism: widowhood,property inheritance,and poverty alleviation in urban Senegal

This article explores the role of women's inheritance and ownership of property in urban Senegal. It shows how being able to inherit and own property promotes the economic and emotional security of widows and their children in urban areas, and discusses the challenges posed by legal pluralism in working on poverty alleviation and social protection in the city.     

Editorial: genetic and genomic research-changing patterns of accountability

Debates about genomic science have raised questions about the implications for ethics and accountability. Accountability has external and internal aspects. Whereas ethical review, including attention to appropriate consent procedures, has been central to 'giving an account' externally, there are also issues internal to the practice of science itself. The pursuit of truth is central to the scientific endeavour, but truths can sometimes be 'inconvenient', leading to complex questions of accountability that go beyond the issues of consent. This is illustrated by the case of the Havasupai.     

Investing in the Citizen-workers of the Future: Transformations in Citizenship and the State under New Labour

There is growing interest in the idea of the “social investment state”. This paper analyses the emergence of such a state in the UK, in the context of a brief account of the more general transformations of citizenship and the state under New Labour. It argues that, despite the iconic status of the child in the social investment state, it is the child as “citizen‐worker” of the future rather than “citizen‐child” of the present who is invoked by the future‐oriented discourse of social investment.     

License Mapping for ERM Systems: Existing Practices and Initiatives for Support

In the process of analyzing and/or mapping license agreements into their electronic resource management (ERM) systems or in developing services to support the license mapping process, library professionals were interviewed to provide a status report of license mapping in academic libraries. Areas discussed include existing practices, challenges, and support for and benefits of the mapping process. These conversations from the trenches should help professionals in the early stages of ERM implementation better conceptualize resource needs and effective practices for license mapping.     

Is diversity in capabilities desirable when adding decision makers?

When the benefit of making a correct decision is sufficiently high, even a slight increase in the probability of making such a decision justifies an increase in the number of decision makers. Applying a standard uncertain dichotomous choice benchmark setting, this study focuses on the relative desirability of two alternatives: adding individuals with capabilities identical to the existing ones and adding identical individuals with mean-preserving capabilities that depend on the states of nature. Our main result establishes that when the group applies the simple majority rule, variability in the capabilities of the new decision makers under the two states of nature, which is commonly observed in various decision-making settings, is less desirable in terms of the probability of making the correct decision.